gemini-3.1-flash-image-preview
Nano Banana 2 (Gemini 3.1 Flash Image Preview) — priced by Google.
Published tiers
What the most recent complete run published for this model, one row per priced tier, each with the source it was read from.
| Tier | Input USD/1M | Output USD/1M | Verified | Read from | Reader | Flags |
|---|---|---|---|---|---|---|
| flat | 0.5 | 3 | 2 hours ago2026-08-16 18:02Z | OpenRouter models APIopenrouter.ai | openrouter_json | confirmed |
Price history
Every distinct value this price has taken, oldest first — what the price did, not how often we happened to look. Rows marked backfill came from a public git history of a third-party pricing file and were never verified by us; they extend the series backwards and are flagged rather than hidden.
flat
2 distinct value(s)inputoutput · range 0.25–3 USD/1M
| First seen | Last seen | Input USD/1M | Output USD/1M | Reads | Source | Last verified by us | Flags |
|---|---|---|---|---|---|---|---|
| 2026-02-28 09:56Z | 2026-03-10 19:42Z | 0.25 | 1.5 | 3 | LiteLLM model_prices_and_context_window.json (git history) | never | backfillunconfirmed |
| 2026-08-15 23:13Z | 2026-08-16 18:02Z | 0.5 | 3 | 16 | OpenRouter models API | 2026-08-16 18:02Z |
Provenance
Read by openrouter_json from OpenRouter models API. Each row above links to the exact page its number came from. The vendor's page is authoritative: if it and this page disagree, the vendor is right and we are wrong.